One of the mysteries of the English language finally explained.
1A language used amongst a restricted group of people or peculiar to a given community, especially one sharing a particular identity; a language used by a small circle of friends.
2Philosophy. A language whose basic terms signify the inner, private perceptions and sensations of the speaker and which is therefore intelligible only to that speaker, the possibility of which was argued against by Wittgenstein.
Mid 16th century; earliest use found in Richard Eden (c1520–1576), translator. From private + language.
private language/ˌprʌɪvɪt ˈlaŋɡwɪdʒ/
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